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Working Paper
Screening and Adverse Selection in Frictional Markets
Lester, Benjamin; Venkateswaran, Venky; Shourideh, Ali; Zetlin-Jones, Ariel (2017-10-10)
We incorporate a search-theoretic model of imperfect competition into a standard model of asymmetric information with unrestricted contracts. We characterize the unique equilibrium, and use our characterization to explore the interaction between adverse selection, screening, and imperfect competition. We show that the relationship between an agent?s type, the quantity he trades, and the price he pays is jointly determined by the severity of adverse selection and the concentration of market power. Therefore, quantifying the effects of adverse selection requires controlling for market ...
Working Papers , Paper 17-35

Discussion Paper
The Origins of Market Power in DeFi
Azar, Pablo D.; Casillas, Adrian; Farboodi, Maryam (2025-04-21)
In our previous Liberty Street Economics post, we introduced the decentralized finance (DeFi) intermediation chain and explained how various players have emerged as key intermediaries in the Ethereum ecosystem. In this post, we summarize the empirical results in our new Staff Report that explains how the need for transaction privacy across the DeFi intermediation chain gives rise to intermediaries’ market power.
Liberty Street Economics , Paper 20250421

Working Paper
Superstar Economists: Coauthorship networks and research output
Hsieh, Chih-Sheng; König, Michael D.; Zimmermann, Christian; Liu, Xiaodong (2018-10-09)
We study the impact of research collaborations in coauthorship networks on research output and how optimal funding can maximize it. Through the links in the collaboration network, researchers create spillovers not only to their direct coauthors but also to researchers indirectly linked to them. We characterize the equilibrium when agents collaborate in multiple and possibly overlapping projects. We bring our model to the data by analyzing the coauthorship network of economists registered in the RePEc Author Service. We rank the authors and research institutions according to their contribution ...
Working Papers , Paper 2018-28

Working Paper
Equilibrium Price Dispersion Across and Within Stores
Menzio, Guido; Trachter, Nicholas (2015-01-15)
We develop a search-theoretic model of the product market that generates price dispersion across and within stores. Buyers differ with respect to their ability to shop around, both at different stores and at different times. The fact that some buyers can shop from only one seller while others can shop from multiple sellers causes price dispersion across stores. The fact that the buyers who can shop from multiple sellers are more likely to be able to shop at inconvenient times induces price dispersion within stores. Specifically, it causes sellers to post different prices for the same good at ...
Working Paper , Paper 15-1

Working Paper
A simple model of price dispersion
Chudik, Alexander (2012)
This article considers a simple stock-flow matching model with fully informed market participants. Unlike in the standard matching literature, prices are assumed to be set ex-ante. When sellers pre-commit themselves to sell their products at an advertised price, the unique equilibrium is characterized by price dispersion due to the idiosyncratic match payoffs (in a marketplace with full information). This provides new insights into the price dispersion literature, where price dispersion is commonly assumed to be generated by a costly search of uninformed buyers.
Globalization Institute Working Papers , Paper 112

Working Paper
Is Sales Tax Included in the Price? Consumer Inattention and Price Competition
Shy, Oz (2024-06-18)
Sales tax is generally not included in the advertised price quoted to consumers in the United States. In contrast, value added taxes (VAT) are embedded into the price in most other countries. This article investigates how the two different pricing structures and consumers' decision-making process affect the intensity of price competition. The two pricing structures yield identical market outcomes with fast-computing consumers who are willing and able to recompute the exact sales tax each time there is a price change. With slow-computing consumers, prices and profits are higher when sellers ...
FRB Atlanta Working Paper , Paper 2024-5

Working Paper
Training and Search on the Job
Lentz, Rasmus; Roys, Nicolas (2015-10-30)
The paper studies human capital accumulation over workers? careers in an on the job search setting with heterogenous firms. In renegotiation proof employment con- tracts, more productive firms provide more training. Both general and specific training induce higher wages within jobs, and with future employers, even conditional on the future employer type. Because matches do not internalize the specific capital loss from employer changes, specific human capital can be over-accumulated, more so in low type firms. While validating the Acemoglu and Pischke (1999) mechanisms, the analysis ...
Working Papers , Paper 2016-25

Report
Brand Reallocation and Market Concentration
Pearce, Jeremy; Wu, Liangjie (2024-08-01)
We study the interaction of customer capital and productivity through brand reallocation across firms. We develop a firm dynamics model with brands as transferable customer capital, heterogeneous firm productivity, and variable markups. We study the matching process between transferable brand capital and core productivity, which can be inefficient with significant welfare implications. We link USPTO trademark data with Nielsen sales data to study the prevalence of brand reallocation and the response of sales and prices to reallocation. Quantitatively, brand reallocation reduces welfare. ...
Staff Reports , Paper 1116

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